- Sudoku Hints
Five new puzzles every day, five difficulty levels, online solving grid, hints, solutions. Archive contains over 1,000 graded puzzles.
- Sudoku Of The Day
Six new puzzles every day, six difficulty levels. Archive. No online solving grid. Excellent illustrated step-by-step guide to solving each puzzle.
- Fiendish Sudoku
Five new puzzles every day, five difficulty levels, online solving grid, hints, step-by-step solutions. Large archive of graded puzzles.
- Print Sudoku
Five new puzzles every day, five difficulty levels. Basic online solving grid. Extensive archive of puzzles.
- Daily SuDoku
One new puzzle every day, awkward online solving grid, hints, solutions.
- BrainBashers Sudoku
Three daily puzzles, three difficulty levels, extensive archive.
- Number Logic
Daily puzzles (varies, average three per day), four difficulty levels, online solving grid, extensive archive.
- Free Sudoku
No daily puzzles but generates puzzles on demand. Difficulty level not specified. Basic online solving grid.
- Sudoku Shack
No daily puzzles but has a large archive of puzzles at four difficulty levels. Basic online solving grid.
- Sudoku Puzzles
Five difficulty levels, no daily puzzles but puzzles are generated on demand. Basic online solving grid.
- sudokusite.eu
Puzzles at four difficulty levels. Also free downloadable PDF booklets of 24 puzzles available in six difficulty levels.
- Web Sudoku
Four difficulty levels, no daily puzzles but generates puzzles on demand. Basic online solving grid.
- Sudoku Fun
Speed challenge. Basic online solving grid.
- Sudoku-san
Four new puzzles every day, four difficulty levels, odd rectangular solving grid. Small archive of puzzles.
- Daily Sudoku Puzzle
Three new puzzles every day, three difficulty levels. Basic online solving grid.
- Su Doku-A-Day
Three new puzzles every day, three difficulty levels. Archive. No online solving grid.
- Sudoku Master
Two new puzzles every day, basic online solving grid, archive of puzzles.
- Sudoku Quest
One graded puzzle every day. Attractive online solving grid.
- Sudoku Grandmaster
One graded puzzle every two days. No online solving grid.
- Sudoku Place
One puzzle per day in PDF format only, plus archive.
- tiscali.games
Three difficulty levels, undated puzzles, small archive.
- Daily Sudoku
Daily Sudoku by David Easton: one puzzle per day, difficulty level not specified. No archive.
- Sudokus-Online.com
Puzzles generated on demand at four difficulty levels, basic online solving grid.
- Goobix Sudoku
No daily puzzles but generates puzzles on demand. Four levels of difficulty. Basic online solving grid.
- sudoku.name
Four difficulty levels, no daily puzzles but generates puzzles on demand. Basic online solving grid.
- sudoku.com.au
Four new puzzles every day, online solving grid. Extensive archive of puzzles.
- Play Sudoku
Three daily puzzles, three difficulty levels. Basic online solving grid.
- Sudoku Online
Four difficulty levels, no daily puzzles but generates puzzles on demand. Puzzles are not always symmetrical. Online solving grid.
- sudoku.cc
One new puzzle every day, difficulty not specified. No online solving grid. Archive of previous puzzles.
- ComputorEdge Sudoku
One graded puzzle per week. No online solving grid.
- Krazydad Sudoku
Large collection of puzzles at five difficulty levels. In PDF format.
- SudokuPuzzles.org
Set of nine graded puzzles. No online solving grid.
- Sudoku Addict
Small collection of graded puzzles. No online solving grid.
- Sudoku Prime
Puzzles are not symmetrical, three difficulty levels. Basic online solving grid.
- Sudoku Puzzles
Sudoku puzzles.
- Sudoku Player
Sudoku puzzles at three difficulty levels.
- Online Sudoku
Online Sudoku and printable games at five difficulty levels.
- Sudoku Live
Online Sudoku at four difficulty levels.
- Sushi Sudoku
Online Sudoku at four difficulty levels. Choice of board symbols.
- Suduko Chimp
One printable sudoku puzzle each day.
- Sudoku Madness
A daily puzzle at one of three difficulty levels. Puzzles are not symmetrical.
- Sudoku of the Day
Daily puzzles at four difficulty levels. Puzzles are not symmetrical.
- Sudoku (Flash)
Six daily puzzles plus random puzzles on demand. Online solving grid. Requires Flash to use all solver features.
